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How long should it take for the ECU to clear?

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Old 07-09-2018, 04:50 AM
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Default How long should it take for the ECU to clear?

Thanks in large part to the help that I received on this forum I was able to bring my 2001 XKR back from the dead. I decided to sell the car to someone who will now continue the work needed to make it nice again. I replaced the fuel pumps, cam sensor, and repaired oil leakage. I then reset the ECU to clear the old fault codes. So far it runs well and no check engine light. The new owner gave me a deposit and has one condition. It has to pass smog test in Reno Nevada. I know it requires that the ECU completes it,s checks before they will allow it to be tested.

My question is , how long should this take and what can or should I do to make this happen? The car is on a non-op, so driving it on the main roads is not really a good idea. But I believe it has to be brought up to temperature before the ecu does it's thing. I can run it around the back roads near my house, but I am wondering how many miles it might need to clear. Any ideas?

Thank you forum members.
Lanny
 
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Old 07-09-2018, 07:50 AM
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I assume your OBD now shows a P1000 and you are wanting to achieve P1111 for all monitors complete. Unfortunately the only method is to perform the drive cycles required to set the monitors. I have attached the drive cycles procedure. You will have to take it out for a drive.

 
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Old 07-10-2018, 02:57 AM
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Thank you so much Vern! This is exactly what I needed.
 
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Old 07-10-2018, 03:42 AM
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I'm afraid that PDF looks rather generic - and somewhat wrong (there's no need for coolant below 0C!). But it's a rough guide.

At the least, start with letting it idle for 10 mins from cold (leave it overnight). No need for the heavy electrical load and indeed people often say to switch a/c off but I've not found it matters.

To try to get EVAP to set, you probably need fuel between (say) 30%-80% and a cold soak overnight.

Let us know which exact monitors have not set.
 

Last edited by JagV8; 07-10-2018 at 03:44 AM.
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Old 07-10-2018, 06:56 AM
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Originally Posted by JagV8
I'm afraid that PDF looks rather generic - and somewhat wrong (there's no need for coolant below 0C!). But it's a rough guide.

At the least, start with letting it idle for 10 mins from cold (leave it overnight). No need for the heavy electrical load and indeed people often say to switch a/c off but I've not found it matters.

To try to get EVAP to set, you probably need fuel between (say) 30%-80% and a cold soak overnight.

Let us know which exact monitors have not set.
Thanks for this. I am getting evap errors I will try this. My NJ sticker is from 2017 I'm way out
 
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Old 07-10-2018, 07:28 AM
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Get the full list of unset monitors. Also, find exactly which ones can be unset in your smog area. It varies a lot.
 
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Old 07-10-2018, 12:57 PM
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my experience was when i bought the car it had been sitting allot, after some work,AND most important, a fresh battery, driving it was the only way to get it to populate properly. it took months and hundreds of miles.
 
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Old 07-10-2018, 01:44 PM
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That suggests either a non-varied kind of driving or (more likely) something is marginally wrong - enough that it eventually passed but only just.

(Phew. And avoid doing anything that will clear the OBD monitors: don't let battery go flat, don't clear codes.)
 
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Old 07-10-2018, 03:15 PM
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Whatever it means it has now passed twice over a year apart. runs like a swiss watch. it did not pass smog for a long while, like months of driving it around, after the shop i took it too put 600 miles on it and it still did not pass...the battery, and every day use populated the memories...and yes, i will not disconnect the battery or take it for granted.
 
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Old 07-10-2018, 05:54 PM
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The other key thing is the tank needs to be half full, you need to avoid hills (to get my car to clear I had to park it at the airport overnight because I lived on a hill). But after months of not clearing the codes, one night at the airport and a drive home and I was good. (Fortunately I travel a lot so parking it at the airport wasn't a problem). Just drive slow so you don't slosh around the gas and it should reset. Pain in the butt...
 
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Old 07-11-2018, 10:27 AM
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My Comprehensive Component Monitor Engine Management Drive Cycle took months. Everything else was about 5 days of driving.
 
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Old 07-11-2018, 12:49 PM
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I just might add that none of this nonsense makes any kind of sense, but it is a known Jaguar thing
 
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Old 07-11-2018, 01:36 PM
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Originally Posted by R3Wood
My Comprehensive Component Monitor Engine Management Drive Cycle took months. Everything else was about 5 days of driving.
Hmm, most on my monitors complete in minutes. Comprehensive takes several days (at, say 30 min commute each way, mostly secondary roads).

This might be worth doing, it goes into some detail (Unfortunately, Comprehensive is not covered): Jaguar Drive Cycle
 
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Old 07-11-2018, 01:49 PM
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Originally Posted by hirev
I just might add that none of this nonsense makes any kind of sense, but it is a known Jaguar thing
It is with a car which is faulty or marginally so, if the preconditions have correctly been followed. BTW a lot of this is required by law so by all means try to change that.

Most smog areas allow 1 or 2 unset monitors. CARB are prone to be more "awkward".
 
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Old 07-12-2018, 07:09 AM
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Originally Posted by fmertz
Hmm, most on my monitors complete in minutes. Comprehensive takes several days (at, say 30 min commute each way, mostly secondary roads).

This might be worth doing, it goes into some detail (Unfortunately, Comprehensive is not covered): Jaguar Drive Cycle
I don't know why it took so long. Many on the forum were very helpful during this time, as I was new to Jaguar. I have posts on how long it took. Now I am battling, as I said the P0456. My inspection is long over due.
 
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Old 07-13-2018, 09:06 AM
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Keep in mind that many states do not require all monitors to be ready. You can have one not ready as long as its the only one not two.
 
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Old 07-13-2018, 01:53 PM
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Sadly California is kind of a pill about the monitors... Pain in the butt... Bend Oregon, where I am now, doesn't even do a smog check. Love this place!
 
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Old 07-13-2018, 02:22 PM
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Well, all my monitors are checked now except the catalytic converter(s). So far, so good. But I wonder just what it takes to get this last monitor to set. I have a pending code of p1000, which simply means"not all monitors are set". Here in California I would imagine that they require all of them.
Thanks for all the input. Without this forum I would not have a clue.
 
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Old 07-14-2018, 09:15 AM
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They may or may not but I think they do require the Cat one to set.

If it hasn't within about a week of varied driving then sadly it'll mean trying to figure why not.
 
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Old 07-15-2018, 01:19 PM
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Originally Posted by Lanny
Well, all my monitors are checked now except the catalytic converter(s). So far, so good. But I wonder just what it takes to get this last monitor to set. I have a pending code of p1000, which simply means"not all monitors are set". Here in California I would imagine that they require all of them.
Thanks for all the input. Without this forum I would not have a clue.
Same here! After replacing a battery and resetting codes its the cat sensor that is stubborn. All the drive cycles completed... Nothing wrong with the car prior to the reset. Nice to know that it resets itself months later sometimes
 


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